以球状星团NGC(New General Catalogue)104、NGC 5139.NGC 6121 为实验样区,选取了视差等10个恒星参数,通过引入地学中的空间分析理论和相应的分析框架为定量描述球状星团成员星的空间分布特征提出了一种基于地学的研究范式.通过计算全局和局部莫兰(Moran)指数得到球状星团成员星各恒星参数的空间分布特征.研究结果表明:球状星团NGC 104、NGC 5139、NGC 6121成员星的各恒星参数在总体上呈现出空间正相关特性,表现出空间集聚特征,但不同恒星参数之间存在差异;局部空间分布也呈现聚集特征,而不同的成员星呈现出不同的空间分布特性和趋势.总体而言,用地学空间相关分析系统地定量化描述球状星团成员星空间分布特征,能够为球状星团的研究提供新的思路.
Spatial Correlation Analysis of Globular Cluster Member Stars
In this study,globular clusters NGC(New General Catalogue)104,NGC 5139 and NGC 6121 were used as experimental areas,and 10 parameters such as parallax were selected.Then,we propose a geography-based research paradigm to quantitatively describe the spatial distribution characteristics of globular cluster members stars by introducing the spatial analysis theory and corresponding analysis framework in geography.Based on this,we obtain the spatial distribution characteristics of parameters of globular cluster member stars by calculating the global Moran's I index,and obtain the local spatial distribution characteristics of parameters according to Moran scatter diagram and LISA(Local Indicators of Spatial Association)agglomeration map.The research results show that the parameters of the member stars of the globular clusters NGC 104,NGC 5139 and NGC 6121 generally exhibit positive spatial correlation characteristics,show the characteristics of spatial aggregation,but there are differences between different parameters.The local spatial distribution also shows aggregation characteristics,and different member stars show different spatial distribution characteristics and trends.In general,this study starts from a new perspective of geo-spatial correlation analysis,systematically and quantitatively describes the spatial distribution characteristics of globular cluster member stars,deepens the understanding of the internal spatial structure and mechanism of globular clusters,and provides new ideas for the study of globular clusters.
NETL
NSTL
万方数据
维普
